From d3a0cc3a8ba6dfeb64d3faeffdeb6845b60e5840 Mon Sep 17 00:00:00 2001
From: Yuchen Pei <me@ypei.me>
Date: Sat, 20 Jan 2018 15:41:49 +0100
Subject: rearranged the dir for github

- removed tools and pdfs
- rearranged the projects dirs
- added md files
- other minor changes
---
 chips/FullAdder.hdl | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100644 chips/FullAdder.hdl

(limited to 'chips/FullAdder.hdl')

diff --git a/chips/FullAdder.hdl b/chips/FullAdder.hdl
new file mode 100644
index 0000000..451499f
--- /dev/null
+++ b/chips/FullAdder.hdl
@@ -0,0 +1,20 @@
+// This file is part of www.nand2tetris.org
+// and the book "The Elements of Computing Systems"
+// by Nisan and Schocken, MIT Press.
+// File name: projects/02/FullAdder.hdl
+
+/**
+ * Computes the sum of three bits.
+ */
+
+CHIP FullAdder {
+    IN a, b, c;  // 1-bit inputs
+    OUT sum,     // Right bit of a + b + c
+        carry;   // Left bit of a + b + c
+
+    PARTS:
+    // Put you code here:
+    HalfAdder (a=a, b=b, sum=sum1, carry=carry1);
+    HalfAdder (a=sum1, b=c, sum=sum, carry=carry2);
+    Or (a=carry1, b=carry2, out=carry);
+}
-- 
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